(* Copyright (C) 2000, HELM Team.
 * 
 * This file is part of HELM, an Hypertextual, Electronic
 * Library of Mathematics, developed at the Computer Science
 * Department, University of Bologna, Italy.
 * 
 * HELM is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * HELM is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HELM; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA  02111-1307, USA.
 * 
 * For details, see the HELM World-Wide-Web page,
 * http://cs.unibo.it/helm/.
 *)

exception HttpClientError of exn * string;;

let send cmd =
 try
  ignore (Http_client.Convenience.http_get cmd)
 with
  e -> raise (HttpClientError (e,cmd))
;;

let get uri =
 try
  Http_client.Convenience.http_get uri
 with
  e -> raise (HttpClientError (e,uri))
;;

let get_and_save uri dest_filename =
 let reply = get uri
 and out_channel = open_out dest_filename in
  output_string out_channel reply ;
  close_out out_channel
;;

let get_and_save_to_tmp uri =
 let flat_string s s' c =
  let cs = String.copy s in
   for i = 0 to (String.length s) - 1 do
    if String.contains s' s.[i] then cs.[i] <- c
   done ;
   cs
 in
  let user = try Sys.getenv "USER" ^ "_" with Not_found -> "" in 
     (* FG: Unix.getlogin () should be used instead of the above *)
  let tmp_file = Configuration.tmp_dir ^ "/" ^ user ^ (flat_string uri ".-=:;!?/&" '_') in
  get_and_save uri tmp_file ;
  tmp_file
;;